Question 1021239
Assume the board cutting is a normal process, an additional 2" total average amongst the 10 boards would be 0.2".
Since this is within a standard deviation, it's pretty likely to occur.
If you assume a 6 sigma process(?), each board could be between 94.5 and 97.5.
So 10 boards could be between 945 and 975 inches.
So if you want 962, you should work to reduce your variation or sort the lengths to ensure a proper fit.